William B. ("Bill") Nash is a partner in Haynes and Boone's Intellectual Property Litigation Practice in the firm's San Antonio and Dallas offices. Bill is a registered patent attorney and litigator with more than 30 years of extensive national and international experience in intellectual property.
As a litigator, Bill protects his clients' rights and is often called upon in critical company litigation. He has handled major patent infringement, trademark infringement, copyright infringement, unfair competition, and trade secret cases in jurisdictions from California to Massachusetts, including the U.S. International Trade Commission (ITC) in Washington, D.C., in addition to those filed in the four federal districts within Texas. As an intellectual property advisor, he has broad experience in infringement and validity opinions, and he regularly helps clients develop strategies to avoid or minimize litigation risks. Bill works closely with his clients to protect, develop, commercialize, and license a company's IP assets, both in the U.S. and internationally. He has been responsible for more than 4,000 trademark filings around the world and has been lead attorney on more than 100 proceedings before the Trademark Trial and Appeal Board.
Bill is AV® Peer Review Rated Preeminent by Martindale-Hubbell® Law Directory and was recognized by World Trademark Review's WTR 1000, Globe Business Publishing, Ltd.in 2017-2024. Bill was recognized in Best Lawyers in America, Woodward/White, Inc., for Litigation - Patent, 2019-2023, and recognized by Best Lawyers as a "Lawyer of the Year," Woodward/White, Inc., 2023. Additionally, Bill was recognized by San Antonio Scene, Scene Monthly LLC, in Best San Antonio Lawyers for Intellectual Property Litigation, 2015. He also received the Outstanding Lawyer Award by San Antonio Business Journal, American City Business Journals, in 2016.
- State Bar of Texas
- Fellow, State Bar Foundation
- American Intellectual Property Law Association
- International Trademark Association
- Recognized in The Best Lawyers in America, Woodward/White, Inc., Litigation - Patent, 2019-2024; Litigation - Intellectual Property, 2024
J.D., St Marys University School of Law, 1988, with distinction; Phi Delta Phi; John M. Harlan Society; Articles Editor, St. Mary's Law Journal
B.S., Ocean Engineering, US Naval Academy, 1980
Canadian Intellectual Property Office
U.S. Patent and Trademark Office
U.S. District Court for the District of Colorado
Texas Supreme Court
U.S. Court of Appeals for the Federal Circuit
U.S. Court of Appeals for the Fifth Circuit
U.S. Court of Appeals for the Tenth Circuit
U.S. District Court for the Eastern District of Texas
U.S. District Court for the Northern District of Texas
U.S. District Court for the Southern District of Texas
U.S. District Court for the Western District of Texas
In its annual rankings, World Trademark Review (WTR) ranked Haynes and Boone, LLP among the nation’s top 12 “Gold-tiered” firms for the 2024 edition of the WTR 1000. This is the 15th consecutive year for Haynes Boone to rank among the nation’s best in the prestigious directory. Haynes Boone ranked as one of only two Gold firms in Texas and among the top 20 firms in New York. With the largest Intel [...]